Oregon Chain Sharpener Replacement Grinding Wheel - 3/16in. Thickness, For .325in.-Pitch (20, 21, 22, 95 Series Chains Only), 3/8in.-Pitch (All Except 90, 91 Series Chains) & .404in.-Pitch Chain
For .325in.-pitch (20, 21, 22, 95 series chains only), 3/8in.-pitch (all except 90, 91 series chains) and .404in.-pitch chain * 7/8in. shaft diameter * 3/16in. wheel thickness